it would be great, except here is a prediction that is sure to come true the next time someone is brutally attacked by one of these camera wearing cops, the device will mysteriously have malfunctioned and no video will be available...

plus, they probably use the information they obtain primarily as a surveillance tool to compile dossiers on protestors, and not to monitor their own actions.

Wow, just like Aliens

Makes me think of Robocop.